Melee summoner build: seafaring campaign

[TLO3]

Starting the Skull & Shackles soon. Working on a melee summoner build. I want the Eidolon to be a sort of horror of the deep that climbs aboard from the water to assist in combat.

For my race I'm considering a Gillman which would make an aboleth-type Eidolon appropriate. Other options include half-elf or demon-spawn tiefling.

20 point buy so stat build will look like this assuming Gillman:

Str: 16
Dex: 12
Con: 16
Int: 10
Wis: 8
Cha: 15

First level feat: Arcane strike

I plan to use a spear in combat, though I may choose a trident or other thematic weapon if I go half-elf.

Future feats would look something like this:

3:Extra Evolution or Craft Wondrous Items if no-one else takes it.
5:Power Attack
7:Dimensional Agility
9:Dimensional Charge
11:Dimensional Dervish
13:Extra Evolution.

Eidolon -
Base form: Aquatic
Evolutions: Free - (Imp. Natural Armor, Gills, Swim, Swim, Bite), Tentacles (2), Climb.
Feat: Multiattack

Eventually making him huge and giving him grab and swallow whole.

Anything wrong with this build? Any must-haves that I'm missing?

[blackbloodtroll]

Perhaps you could choose the Mount evolution, and play a Merfolk.

[TLO3]

blackbloodtroll wrote:

Perhaps you could choose the Mount evolution, and play a Merfolk.

I know that works mechanically, but I don't plan on having my Eidolon on the deck of the ship all the time and I'm not interested in flopping around. Also, Merfolk ride side-saddle and that's a deal breaker.

[blackbloodtroll]

Perhaps an Elf with the Spirit of the Waters alternate racial trait, or a Half-Elf with the Water Child alternate racial trait.
A Tiefling with the Variant Tiefling Ability of a swim speed of 30ft would work. This would replace the darkness ability.

[TLO3]

blackbloodtroll wrote:

Perhaps an Elf with the Spirit of the Waters alternate racial trait, or a Half-Elf with the Water Child alternate racial trait.

A Tiefling with the Variant Tiefling Ability of a swim speed of 30ft would work. This would replace the darkness ability.

Well it's either Half-elf or Gillman for race. Really, the main thing I'm looking for are feat critiques or any must have evolutions, etc.

Possible lvl 13 Eidolon build if I go half-elf for the bonus evolutions

22 Evolution points

Climb, Tentacle (2), Bite (improved for 1.5 x str damage), Grab, Swallow Whole, Large, Huge, Scent, Keen Scent.

Might swap out scent and keen scent. Also, climb might not be necessary once I learn overland flight.

Does the update on grab which makes it work for creatures up to the same size apply to the Eidolon evolution as well?

For feats I was thinking: Power Attack, Step up, Following Step, Step up & Strike and Intimidating prowess.